Backgrounder on Sulfonyl Urea Herbicides Written by Mark Flogel September 3rd, 1998 Vermont Public Interest Research Group64 Main StreetMontpelier, VT 05602(802) 223-5221 Sulfonyl Urea Herbicides Sulfonyl ureas (SUs) are a growing class of herbicides, first created in the mid-1970s and onthe market since 1982. Produced by a several manufacturers, SUs are touted as "safe"her